Tumbling mill or barrel.



PATENTED JUNE 16 J. FULLER. TUMBLING MILL- 0R BARREL.

APPLICATION FIIJED SEPT. 26, 1902.

2 SH'FETS-SHEET 1.

H0 MODEL.

TNLNORRIS vrrzns cc FHOYO-LITNO. wAsuwsmn n c.

No. 730,900. PATENTED JUNE 16; 1903.

J. W.-FULLER. TUMBLING MILL 0R BARREL.

APPLICATION FILED SEPT. 26, 1902. N0 MODEL. 2 SHEETS-SHEET 2.

UNITED STATE Patented June 16, 1903.

PATENT OFFICE.

JAMES W. FULLER, F CATASAUQUA, PENNSYLVANIA.

TUMBLING MILL OR BARREL.

SPECIFICATION forming part of Letters Patent No. 730,900, dated. June16, 1903.

Application filed September 26,1902. Serial No. 124,915. (No model.)

To all whom it flung concern:

Be it known that I, JAMES W. FULLER, a citizen of the United States,residing at Catasauqua, in the county of Lehigh and State ofPennsylvania, have invented certain new and useful ImprovementsinTumbling Mills or Barrels, of which the following is a specification.

My invention has relation to a tumbling mill or barrel especiallyadapted for the re- A duction of hard substances, such as cement,

in bulk to powder by trituration, and in such connection it relates moreparticularly to the construction and arrangement of such a mill orbarrel.

The principal objects of my present invention are, first, to provide ina tumbling mill or barrel a lining formed of a series of detachable ironplates each having a flange at one end and overlapping an adjacentunflanged end and arranged -to be secured together to form asubstantially unbroken cylindrical internal wall for the barrel, and,second, to provide in such a mill or barrel a series of detachable ironsections or plates, each plate having on its interior a series ofsemispherical indentations or recesses.

The nature and scope of my invention will be more fully understood fromthe following description, taken in connection with the accompanyingdrawings, forming part hereof, in which Figure l is a side elevationalview, partly broken away, of a tumbling barrel or mill embodying mainfeatures of my invention. Fig. 2 is a cross-sectional view, enlarged, ofthe barrel; and Figs. 3 and 4 are respectively front and rearelevational views, enlarged, of one of the detachable sections orplates.

Referring to the drawings, a represents the cylindrical outer "casing ofa tumbling mill or barrel. The interior of this casing to is lined witha series of plates Z), each curved to form when assembled a cylinderconcentric with the casing a, as illustrated in Fig. 2. Each plate orsection b has at one end or edge a flange b, projecting inward andarranged to overlap the unflanged end or edge of an adjacent section. Aseries of bolts 19 are adapted when advanced through the flanges Z) andinto the casing a to lock the adjacent plates together and to secure thesame to the casing a. On the interior surface of each plate I) is formeda series of semispherical indentations or recesses cl, arranged in rows,which rows are parallelhorizontally; but the indentations are instaggered or inclined relationship vertically. At either side of eachplate b is formed a recess 6, adapted to receive acorrespondingly-shaped lug projecting from the interior of the casing a,so as to more securely lock each plate to said casing, as well as torelieve the strain upon the bolts 12 In operation the hard cement orsimilar materials are introduced into the barrel together with a numberof balls or Greenland pebbles. W'hen now the barrel is rotated, theballs or pebbles roll over the inner surface of the plates and areproperly deflected by the semispherical indentations (I, so that thematerial may be completely ground. The shape of the indentations d issuch that Very little friction between the balls and the plates arises,so that the wear upon the balls and plates is minimized withoutimpairing the triturating action upon the material to be reduced. Theplates 1) are preferably formed of chilled iron.

Having thus described the nature and objects of my invention, what Iclaim as new, and desire to secure by Letters Patent, is-

In a tumbling barrel or mill, an external cylindrical shell and aninternal concentric lining, said lining formed of a series of segmentalplates overlapping at the ends to form annular sections for the lining,one section having at one end a flange overlapping an unflanged end ofan adjacent section, bolts passing through the flange and through theexternal shell T and adapted to tightly clamp the overlapping sectionstogether and to the shell, and a series of ,semispherical indentationsextending a short distance into the inner face of each plate andarranged in rows, said rows being in staggered relationship to eachother.

In testimony whereof I have hereunto set my signature in the'presence oftwo subscribing witnesses.

J AMES W. FULLER.

\Vitnesses:

A. N. ULRICH, C. N. ULRICH.

